Bio:Slash is from Dimension X. His homeworld was destroyed when alien invaders came and cut down all the palm trees. Slash left his world with the help of Krang. Krang sent Slash after the turtles, telling him that the turtles were responsible for the loss of the palm trees.

Later, Slash discovered the truth and became very angry at Shredder and Krang.

Eventually, Slash ran across the Mutanimals after he got in trouble over a misunderstanding with Earth authorities. The mutanimals took Slash to a deserted island filled with palm trees where Slash (supposedly) lived happily ever after.